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3 Sheets-Sheet 1. F. G. WHEELER. STEAM GENERATOR FOR STREET GAR OR OTHER LOGOMOTIVE ENGINES.

Patented June 3, 1884.

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' F. G. WHEELER. A STEAM GENERATOR EoR STREET OAR OR OTHER LOGOMOTIIVEIBNGINES.

Patented June 3, 1884.

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F. G. WHEELER.

STBAMWGENERATHOIE E93 STREET GAR OR OTHER LOGOMOTI-VE ENGINES No. 299,607. Pat rated June 3, 1884.

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NITED STATES PATEELQEEIQE.

FREDERICK G. WHEELER, OF NEW YORK, N. Y.

STEAM-GENERATOR FOR STREET-CAR OR OTHER LOCOMOTIVE ENGINES.

SPECIFICATION forming part of Letters Patent No. 299,607, dated June 3, 1884.

Application filed June 13, 1883. (No model.)

To all whom it may concern Be it known that-I, FREDERICK GRIDLEY WHEELER, of New York city, county of New York, and State of New York, have invented new and useful Improvements in Steam-Generators for Street-Car or other Locomotive Eu- .gines; and I do hereby declare that the following is afull and exact description of the same,

reference beinghad to the accompanying drawings, and to the letters of reference marked thereon.

This invention consists, mainly, first, in the combination of a firebox for supplying the requisite heat to produce the steam or sustain that already produced with a waterchamber in convention applied thereto, showing a side view of the tubes on oneside; Fig. 2,-a-n end view of the same, partially in section; Fig. 3, a plan view of the fire-box,partially in section, showing smoke-flue and tube-connections; Fig. 4,a plan view of the water-box, exhaust-chamber, and the connection of the exhaustchamber and water-flue with the water-box; Fig. 5, a longitudinal vertical section, on an enlarged scale, of the water-box and the parts immediately connected therewith. Fig. 6 is an end elevation of the hood or return-bend connecting the tubes.

To enable others skilled in the art to make my invention and properly use the same, I will proceed to describe fully its construction and manner of operation.

A represents an engine, the actuating mechanism of which may be of any proper construction, this portion of the same forming no part of my invention.

B, Figs. 1; 2, and 3, represents a small firebox located beneath the engine at one end of the same,having an inner wall or shell, b,of copper or other metal, and an outer wall or shell, b,

of steel or iron,with intermediate water-chamber, as shown. These shells are provided with 5 5 proper stays or bolts in a manner well understood.

O 0, Figs. 1,, 2, and 3, represent short pipes of comparatively small size leading from the front side of the water-chamber to the rear end of the large pipes D D, the two being united by a flanged connection of proper construction in a manner well understood.

E, Figs. 1, 2, and 6, represents hoods or return-bends, (fully illustrated in Fig. 6,) consisting of a casting having a central tube-like portion, 6, and end portions, 6 e,with openingse 6 adapted to receive and connect the ends of adjacent pipes by flanges, as shown. Bymeans of these hoods the front ends of the pipes DD are united to the front ends of the pipes F F, as shown in Fig. 2, thus making a connecting extension in both series of pipes.

G G, Fig. 2, represent hoods or return-bends of similar construction at the opposite end, by means of which the rear ends of the pipes F F are united to the rear ends of the pipes H H.

I I, Fig. 2, represent hoods or return-bends of similar construction at the opposite end, by means of which the front ends of the pipes H H areunited to the front ends of thepipes J J.

- K K, Fig. 2, represent hoods or return-bends of similar construction at the opposite end, by means of which the rear ends of the tubes J J are ignited to the upper enlarged tubes or domes, 8 5

M M, Fig. 2, represent pipes leading from the lower sides of the domes L L at their forward ends back to the sides of the water-chamber, as shown. By means of the pipes G G and 0 M M the water-chamber is connected to each end of the tube system throughthe domes, this construction affording a perfect circulation when the water Volume contained therein is subjected to the action of heat. I 9 5 N N, Figs. 1 and 2, represent auxiliary pipes leading from the upper side of the water-chamber into the upper side of the domes L L, as shown, by which the circulation of water through the domes is accelerated, because it? I00 more directly connects the domes with the water-chamber. A single fire-box and a single water-chamber is employed in connection with two systems of tubes, a system being located on each side of the engine, as shown, both systems being connected through the domes.

0, Fig. 1, represents a cock by means of which both systems of tubes are supplied with water through the water-chamber.

P, Figs. 1, 3, 4, and 5, represents the smokefiue, consisting of a pipe of suitable length, which extends in a circuitous line from the firebox to the water-box beneath the ear, the discharge end of the same opening on the surface of the water, as shown in Fig. 5.

Q, Fig. 1, represents a small steam-pipe ex tending from one of the domes, the discharge end of which opens into the smoke-flue at any suitable point in its length. By means of this construction a jet of steam may be thrown into the chimney,and the steam being of lower temperature than the products of combustion, the latter will be cooled, carried forward into contact with the water box, and there further cooled.

R,'Figs. 1 and 5, represents the water-box before referred to, into which discharge the s1noke-flue and the exhaust-steam pipe, as shown.

S, Figs. 1 and 2, represents a water-tank above the system of hot-water pipes, and disconnected therewith, containing cold water to supply the condensing system.

8 represents a pipe by which water taken from the tank S is discharged through the spraying device into the water-box beneath the ear. The spraying device, it will be observed, is provided with a cone, 8*, Fig. 5, for dividing the water-strea1n and discharging it equally on all sides.

1' represents a basin for receiving the water from the spraying device sflwhieh device itself receives water through the pipe 8 from the tank S, located at the top of the engine, as shown in Figs. l and 2. The interior basin, 0', is provided on the outer edge or flange with apertures,through which the overflow water escapes and passes down into the bottom of the waterbox,whenee it is returned through the ej ectorpipe to the tank S. By this construction the basin 9' will be kept full of water, while the water below it may be returned to the tank.

0', Fig. 5, represents a chamber adapted to receive the overflow water from the basin through proper openin gs in the flange, as shown in Fig. 4.

9- Fig. 5, represents an injector-pipe, by means of which the water in the chamber 1* is returned to the tank S.

T represents one of a series of openings through the water-box near its top,which openings are adapted to furnish the necessary draft and permit the escape of any excess of water which may accumulate.

T, Fig. 5, represents the discharge end of the exhaust-pipe, to which is attached a spraying device in such manner as to deliver the water upon the steam, and thus obtain the desired condensation.

U, Fig. 4, represents an enlarged chamber communicating with pipe T, into which the exhaust-steam is delivered from the cylinders, by which its force is weakened.

V V, Figs. 1 and 2, represent pipes leading from the tops of the domes into a central pipe, X, from which the supply of steam for the cylinders is drawn in any proper manner.

The operation of my invention is substan tially as follows: The water-chamber and tube system having been supplied with water, either cold or hot, through the cock 0 until the domes L L are half-full of water-,and the fiI'O'DOX having been supplied with fuel, the following operation will result under the action of heat: The water in the water-chamber will be caused to pass through the various pipes and hoods to the domes, and then back again to the chamber, a continuous circulation of heated water thus being maintained. The steam generated under the action of the heat will accumulate in the domes and be drawn off as needed through the central connecting-pipe, X, to the cylinders on each side of the car. As the water is diminished in volume the pressure of the steam is increased. This results from the increase in the area of the evaporating-surface and the elevation of the temperature of the water. The surplus products of combustion from the firebox are carried downward through the smokeflue into the water-box beneath the engine and discharged upon its surface. By means of this action a large portion of the smoke and gases is caught and retained. The draft is increased at any time, if desired, by the proper use of the blow-pipe in the smoke-flue.

The purpose of this invention is to supply a means of propelling street or other ears with out the use of animal power, and is specially adapted for carrying practically into effect the process of supplying motive heat to railroadcars described in the patent of E. H. Angamar, November 27, 187 7, No. 197 ,584, in which water raised to a boiling-point in a stationary boiler is supplied to the water-chamber in the motor-car; butit may be employed, if desired, without using this process.

Some of the advantages of the described construction are as follows: By the employment of a system of tubes in the manner described, the heat of the water volume is more perfectly maintained and the circulation more easily effected than when small tubes are employed. By locating the main portion of the circulating system out of contact with the fire-box, the portion in contact therewith is kept covered with water, and the steam generator or'space where the water assumes the form of vapor or steannbeing kept entirely distinct from the firebox, renders it impossible for the steam to come in contact with the heated surface or for explosive conditions to occur. By discharging the surplus products of combustion and the exhaust-steam through a condensing medium -into a water-box beneath the car, the objection of escaping smoke or steam is avoided.

Having thus fully described my invention,

what I claim as new, and desire to secure by Letters Patent, is-

1. The combination of a fire-box for supplying the requisite heat to produce the steam or to sustain that already produced in a separate stationary boiler with a water-chamber in contact with the fire-box and a system of watertubes communicating therewith, not in contact with the fire-box, substantially as described.

2. In combination with the water-chamber surrounding the fire-box, the circulating system of pipes and tubes, and the auxiliary pipes M M and N N, as described.

3. The water box having the basin, the chamber, and the injector-pipe, as described.

4. A steam street-car or locomotive containing the following elements working in combination, substantially as herein described, namely: a fire-box and surrounding water-ch amber, a tube system connected with water-chamber, an engine taking steam from tube system, a water-box communicating with the chimney of the fire-box, a steam-j et in the chimney to eject and cool the products of combustion and regulate chimney-draft, a water-tank and spray to condense the exhaust-steam, an ejector-pipe to return the water of the water-box to the tank, all as set forth.

5. In a steam street-car or locomotive, the water-box R, constructed with an interior water-basin, r, the flanges of which have openings to allow the descent of the surplus water into the bottom of the box It, substantially as herein shown and described.

6. In the combination of the fire-box and 5 smoke-flue with a water-box having perforations, as described, the products of combustion being discharged upon the top of the water, and not into the same, as and for the purpose described.

7. In combination with a water-chamber in contact with the fire-box and a system of wa-. ter-tubes not .in contact with the fire-box, a cock, 0, for receiving a heated water-supply from a stationary boiler, as described.

8. In combination with the steam-jet pipe Q, the flue P, and the water-box R, having the series of openings r as described.

9. A steam-generator for street-cars,consisting of a fire-box, a system of water-tubes remote from the source of heat, and a steamdome, substantially as described.

10. In combination with asteam-dome supplying a locomotive or street-car engine, a reservoir of connected water-tubes remote from the source of heat, and forming a storage and circulating system for water heated before enterin g the tubes to a degree which shall evolve steam.

This specification signed and witnessed this 60 13th day of June, 1883.

FREDERICK G. WHEELER.

\Vitnesses:

H. W. BEADLE, THEODORE S. WEsT. 

